Pressure testing device for simulating use condition of bottom valve

Abstract

The utility model discloses a pressure testing device for simulating a use condition of a bottom valve, which is characterized by comprising a pressure loading assembly, a bottom valve to be tested and a bottom valve testing tool, the core of the pressure loading assembly is a multi-stage pump additionally provided with a frequency converter, and the main body of the testing tool is a pressure container. According to different nominal drift diameters of the bottom valve to be tested, the variable-diameter flange plates with different sizes are selected to be detachably connected in the whole testing device, the testing device simulates the actual working condition of the bottom valve, and the testing device is suitable for expansion type discharging valves with different drift diameters, particularly the valve bodies of the expansion type discharging valves with 45-degree or 135-degree included angles; meanwhile, components of the testing device can be recycled for daily production and life and are green and economical.

Description

Technical Field

[0001] The utility model belongs to the field of valve testing, and particularly relates to a pressure testing device for simulating the working conditions of a foot valve. Background Technique

[0002] As a switching valve for inlet and discharge at the bottom of a mobile pressure vessel, the foot valve has a relatively high usage frequency among all valve parts of pressure vessels. A high usage frequency means a higher risk of human operation and more complex working conditions. For example, when an operator fills the medium into the container before the discharge valve is opened, it is very easy to cause damage to the foot valve due to pressure. At present, most valve pressure tests are carried out on a valve pressure test bench, which fails to accurately simulate the complex working conditions and unexpected situations during the actual operation of the valve.

[0003] On the other hand, most bottom discharge valves are spread valves, and the tank connection end and the pipe connection end form an angle of 45° or 135°. Therefore, there are few test bench test fixtures available for the pressure test of spread valves.

[0004] Therefore, a new technical solution is needed to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a pressure testing device for simulating the working conditions of a foot valve to solve the problem that the valve pressure test bench in the above background technique fails to simulate the actual working conditions of the spread discharge valve.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A pressure testing device for simulating the working conditions of a foot valve, characterized by comprising: a pressure loading component, a foot valve to be tested, and a foot valve test fixture. The pressure loading component is detachably connected to the pipe connection end of the foot valve to be tested through a flange, and the foot valve test fixture is detachably connected to the tank connection end of the foot valve to be tested through a flange.

[0007] The pressure loading component includes a water storage tank, a check valve, a first water suction pipe, a vacuum water diversion tank, a second water suction pipe, a multistage pump, a frequency converter, and a water outlet pipe. The check valve is arranged at the lower end of the first water suction pipe and placed in the water storage tank. One end of the vacuum water diversion tank is connected to the first water suction pipe, and the other end is connected to the multistage pump through the second water suction pipe. The multistage pump is connected to the frequency converter, and the motor speed and output power of the multistage pump are controlled by the frequency converter. The water outlet pipe is connected to the multistage pump to apply pressure loading to the foot valve to be tested. A pressure gauge is arranged on the water outlet pipe in the pipeline.

[0008] The described foot valve testing tooling includes a testing barrel, a camera, and a welded flange. The testing barrel is horizontally fixed on the ground through a scaffolding support and has an opening at the bottom. The welded flange is welded at the opening at the bottom of the testing barrel for connecting the foot valve to be tested. The camera is placed inside the testing barrel, and the camera lens is aligned with the foot valve to be tested. The testing barrel is a pressure vessel.

[0009] The flange is a stepped flange, and its specific dimensions are determined by the nominal diameter, the diameter of the outlet pipe, and the dimensions of the welded flange of the foot valve to be tested. When the foot valve to be tested is connected to the pressure loading component and the testing tooling, an O-ring seal is used.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] On the one hand, the present utility model adjusts the frequency of the water pump motor through a frequency converter to change the water pressure in the outlet pipe to load the foot valve. On the other hand, the bottom discharge valve is fixedly connected to the pressure vessel testing barrel to simulate the actual working conditions of the foot valve.

[0012] The present utility model selects different stepped flanges for detachable connection according to the foot valves to be tested with different nominal diameters, making the testing device versatile.

[0013] All components of the present utility model are common machinery or tools in the valve working scenario, and are easy to install. All devices can be recycled for daily production and life, which is green economy. Description of the Drawings

[0014] Figure 1 is a schematic diagram of the overall structure distribution of the present utility model;

[0015] Figure 2 is Figure 1 an enlarged schematic diagram of the structure of area A in

[0016] Figure 3 is a schematic diagram of the structure of the stepped flange.

[0017] Among them: 1, water storage tank; 2, check valve; 3, suction pipe I; 4, vacuum priming tank; 5, suction pipe II; 6, multistage pump; 7, frequency converter; 8, pressure gauge; 9, outlet pipe; 10, foot valve to be tested; 11, testing barrel; 12, camera; 13, welded flange. Detailed Embodiments

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model.

[0019] As Figure 1As shown in the figure, a pressure test device for a bottom discharging valve includes: a pressure loading component, a bottom discharging valve 10 to be tested, and a bottom valve test tooling. The pressure loading component is connected to the pipe connection end of the bottom valve 10 to be tested, and the bottom valve test tooling is connected to the tank connection end of the bottom valve 10 to be tested. Among them, the pressure loading component includes a water storage tank 1, a check valve 2, a water suction pipe I 3, a vacuum water diversion tank 4, a water suction pipe II 5, a multi-stage pump 6, a frequency converter 7, and a water outlet pipe 9; the bottom valve test tooling includes a test barrel 11, a camera 12, and a welded flange 13.

[0020] When the nominal diameter of the bottom valve 10 to be tested is the same as the inner diameters of the water outlet pipe 9 and the welded flange 13, the assembly process of the present utility model is as follows: As Figure 1 shown, for the pressure loading component part: The lower end of the water suction pipe I 3 is connected to the check valve 2 through a flange and placed in the water storage tank 1. The upper end of the water suction pipe I 3 is connected to the water inlet of the vacuum water diversion tank 4 through a flange. The water outlet of the vacuum water diversion tank 4 is connected to the water inlet of the multi-stage pump 6 through the water suction pipe II 5. The multi-stage pump 6 is connected to the frequency converter 7, and the water outlet is connected to the water outlet pipe 9 through a flange. A pressure gauge 8 is provided on the water outlet pipe 9; for the test tooling part: The test barrel 11 is horizontally fixed on the ground through a scaffolding support (not shown), with an opening at the bottom. The welded flange 13 is welded at the opening, and the camera 12 is placed inside the test barrel 11, and the camera lens is aligned with the bottom valve 10 to be tested. The connection of the bottom valve 10 to be tested is as Figure 2 shown, the flange of the pipe connection end of the bottom discharging valve 10 to be tested is connected to the flange of the water outlet pipe 9 with bolts, and the flange of the tank connection end is connected to the welded flange 13 at the bottom opening of the test barrel 11 with bolts. An O-ring is used for sealing during connection.

[0021] When the nominal diameter of the bottom valve 10 to be tested is not the same as the inner diameters of the water outlet pipe and the welded flange 13, the assembly process of the present utility model is as follows: As Figure 1 shown, for the pressure loading component part: The lower end of the water suction pipe I 3 is connected to the check valve 2 through a flange and placed in the water storage tank 1. The upper end of the water suction pipe I 3 is connected to the water inlet of the vacuum water diversion tank 4 through a flange. The water outlet of the vacuum water diversion tank 4 is connected to the water inlet of the multi-stage pump 6 through the water suction pipe II 5. The multi-stage pump 6 is connected to the frequency converter 7, and the water outlet is connected to the water outlet pipe 9 through a flange. A pressure gauge 8 is provided on the water outlet pipe 9; for the test tooling part: The test barrel 11 is horizontally fixed on the ground through a scaffolding support (not shown), with an opening at the bottom. The welded flange 13 is welded at the opening, and the camera 12 is placed inside the test barrel 11, and the camera lens is aligned with the bottom valve 10 to be tested. The bottom valve 10 to be tested is connected to the flange of the water outlet pipe 9 and the welded flange 13 at the bottom opening of the test barrel 11 through a reducing flange as Figure 3 shown. An O-ring is used for sealing during connection.

[0022] The utility model controls the motor speed of the multi-stage pump through a frequency converter to change the flow rate and head of the multi-stage pump, and thus changes the water pressure in the outlet pipeline to achieve hierarchical loading of the bottom valve to be tested. The specific test steps are as follows:

[0023] Connect the power supply of the frequency converter 7 to make the multi-stage pump 6 start working;

[0024] 2) The water in the reservoir 1 is pumped out by the multi-stage pump 6 into the vacuum priming tank 4;

[0025] 3) The bottom valve 10 to be tested is in a closed state, and the test high-pressure water is injected into the valve cavity through the outlet pipe 9;

[0026] 4) By adjusting the frequency converter 7, the water pressure in the outlet pipe 9 is gradually increased, and the water pressure is observed and recorded through the pressure gauge 8;

[0027] 5) Observe the bottom condition of the bottom valve 9 to be tested in the test barrel 11 through the camera 12. When the bottom valve 10 to be tested shows deformation and water leakage, the test pressure upper limit value is reached, and the operation of the frequency converter 7 is stopped and the multi-stage pump 6 is shut down.

Claims

1. A pressure test device for simulating the use of a bottom valve, characterized in that: include: A pressure loading component, a bottom valve to be tested and a bottom valve testing tool, wherein the pressure loading component is detachably connected to the pipe connection end of the bottom valve to be tested via a flange, and the bottom valve testing tool is detachably connected to the tank connection end of the bottom valve to be tested via a flange.

2. A pressure testing device for simulating the use condition of a bottom valve according to claim 1, characterized in that: The pressure loading component includes a water reservoir, a check valve, a water pumping pipe I, a vacuum water diversion tank, a water pumping pipe II, a multistage pump, a frequency converter and a water outlet pipe. The check valve is arranged at the lower end of the water pumping pipe I and placed in the water reservoir. One end of the vacuum water diversion tank is connected to the water pumping pipe I, and the other end is connected to the multistage pump through the water pumping pipe II. The multistage pump is connected to the frequency converter and the motor speed and output power of the multistage pump are controlled by the frequency converter. The water outlet pipe is connected to the multistage pump to realize pressure loading on the bottom valve to be tested.

3. A pressure testing device for simulating the use condition of a bottom valve according to claim 2, characterized in that: The water outlet pipe is provided with a pressure gauge on the pipeline.

4. A pressure testing device for simulating the use condition of a bottom valve according to claim 2, characterized in that: The bottom valve testing tool includes a test barrel, a camera and a welding flange. The test barrel is fixed flat on the ground by a scaffolding bracket and has an opening at the bottom. The welding flange is welded at the opening at the bottom of the test barrel and is used to connect the bottom valve to be tested. The camera is placed inside the test barrel, and the camera lens is aimed at the bottom valve to be tested.

5. A pressure testing device for simulating the use condition of a bottom valve according to claim 4, characterized in that: The test barrel is a pressure vessel.

6. A pressure testing device for simulating the use condition of a bottom valve according to claim 4, characterized in that: The flange is a variable diameter flange, and its specific size is determined by the nominal diameter of the bottom valve to be tested, the diameter of the outlet pipe, and the size of the welding flange.

7. A pressure testing device for simulating the use condition of a bottom valve according to claim 6, characterized in that: The flange plate adopts O-ring sealing when connecting the bottom valve to be tested with the pressure loading component, the bottom valve to be tested and the bottom valve testing tooling.

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